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D( x )
x = 0
5*y^-9*z^-7 = 0
x = 0
x = 0
5*y^-9*z^-7 = 0
5*y^-9*z^-7 = 0
5*y^-9*z^-7 = 0
x naleu017Cy do R
x belongs to the empty set
(15*x^-6*y^4*z^2)/(5*y^-9*z^-7) = 0
x belongs to the empty set
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